/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.editor;

import java.util.*;
import java.awt.*;
import java.awt.event.*;

import self.awt.*;
import self.gee.*;
import self.gee.editor.*;

import self.amigo.editor.cmd.*;

public abstract class ACreationTool extends AEditingTool {
  public void mousePressed( MouseEvent e ) {
    createViewElement( e );
  }
  
  public void mouseReleased(MouseEvent e) {
    IGraphicElement elem = getCreatedElement();
    if ( elem != null ) {
      ElementCreation cmd = new ElementCreation( editor, controller, elem );
      editor.executeCommand( ICommand.ET_PRE_EXECUTED, cmd );
      java.util.List sel = Collections.singletonList( elem );
      editor.setSelectedElements( sel );
      editor.inspectSelectedObjects( sel );
    }
    endToolUseIfNotRequested( e );
  }
  
  public void mouseEntered(MouseEvent e) {
    Component comp = (Component) e.getSource();
    comp.setCursor( CursorUtils.CROSSHAIR );
  }
  
  public void mouseExited(MouseEvent e) {
    Component comp = (Component) e.getSource();
    comp.setCursor( CursorUtils.DEFAULT );
  }
  
  public void mouseDragged(MouseEvent e) {
    sizeCreatedViewElement( e );
  }
  
  public void keyReleased(KeyEvent e) {
    if ( e.getKeyCode() ==  KeyEvent.VK_ESCAPE ) 
      cancelElementCreation();
  }

  abstract protected void cancelElementCreation();  
  abstract protected IGraphicElement getCreatedElement();
  abstract protected void createViewElement( MouseEvent e );
  abstract protected void sizeCreatedViewElement( MouseEvent e );
  
  protected void endToolUseIfNotRequested( MouseEvent e ) {
//    if ( !e.isControlDown() ) {
    if ( !e.isShiftDown() ) {
      editor.setSelectionTool();
      Component comp = (Component) e.getSource();
      comp.setCursor( CursorUtils.DEFAULT );
    }
  }
}
